Brazil has introduced new technical requirements for signal enhancers, mobile network boosters, and audio recorders to ensure compliance with telecommunications and electrical equipment standards
Brazil Sets New Technical Standards for Signal Boosters and Audio Recorders
Importers and manufacturers must meet new conformity and safety requirements.
What changed
Conformity assessment required for signal boosters and mobile network boosters under Act No. 5885.
Lithium battery safety standards introduced for stationary applications in electrical equipment.
Product marking updated for Anatel homologation identification on telecommunications products.
Technical requirements proposed for ATSC 3.0 transmitters to control interference.
Data center procedures under public consultation for technical requirements.
Who it affects
Importers of signal boosters must obtain conformity assessment certificates.
Manufacturers of electrical equipment must meet new lithium battery safety standards.
Audio recorder producers must comply with updated marking procedures.
Maritime service operators must follow amended spectrum use requirements.
Compliance Requirements for Signal Enhancers, Mobile Network Boosters, and Audio Recorders in Brazil
Brazil has introduced updated technical and operational requirements for signal enhancers (reforçadores de sinais) and related equipment to ensure compliance with telecommunications and electrical standards under the oversight of Agência Nacional de Telecomunicações (Anatel). These requirements are governed by the General Telecommunications Law (Lei nº 9.472/1997), Resolução nº 772/2025 (Plano de Atribuição, Destinação e Distribuição de Faixas de Frequências – PDFF), Resolução nº 773/2025 (Regulamento de Condições de Uso de Radiofrequências), and specific Atos de Requisitos Técnicos issued by Anatel’s Superintendência de Outorga e Recursos à Prestação.
Below is a structured breakdown of the key compliance obligations:
1. General Requirements for Signal Enhancers
1.1. Operational Compliance
- Signal enhancers must operate in strict accordance with:
- Manufacturers must provide the following with the equipment:
- A user manual with installation and operation instructions1.
- Guidance restricting the use of only manufacturer-provided antennas and cables1.
- Consumer support contact information1.
- Warning materials about:
- Consumer responsibilities1.
- The obligation to immediately shut down the device in case of interference1.
1.2. Definition and Scope
- A Reforçador de Sinais Interno do SMP is defined as equipment used indoors to amplify SMP signals (e.g., mobile networks) without frequency translation, operating bidirectionally and automatically at low power1.
2. Technical Requirements
2.1. Transmission and Gain Limits
| Parameter | Requirement | Citation |
|---|---|---|
| Maximum Gain (Uplink/Downlink) | – Selective fixed enhancers: ≤ 19.5 dB + 20 Log(F) (F = central frequency in MHz) or ≤ 100 dB if automatic gain adjustment is used1. – Selective mobile enhancers: – 15 dB (direct cable connection to mobile station). – 23 dB (direct contact, e.g., cradle). – 50 dB (internal antenna). – 58 dB (below 1 GHz) or 65 dB (above 1 GHz) with automatic return cancellation1. | 1 |
| Noise Power Limits | – Broadband enhancers: Noise power ≤ (-103 dBm/MHz – RSSI) dB/MHz (uplink only)1. – Selective enhancers: Noise power measured in both uplink/downlink, excluding licensed spectrum1. – Maximum noise power: ≤ -70 dBm/MHz in donor/server ports1. | 1 |
| Intermodulation Products | ≤ -19 dBm in supported operating bands (tested at max gain/power with two 600 KHz-separated signals)1. | 1 |
| Frequency Stability | – ≤ 960 MHz: ±5 ppm tolerance1. – > 960 MHz: ±10 ppm tolerance1. | 1 |
| Uplink Inactivity | After 5 minutes of inactivity, noise power in the uplink must not exceed -70 dBm/MHz1. | 1 |
2.2. Automatic Safeguards
- Enhancers must include non-user-alterable automonitoring functionalities to mitigate interference in real time1.
- Automatic Gain Control (AGC) and anti-oscillation mechanisms are mandatory1.
2.3. Emissions and Filtering
- Out-of-band emissions must comply with limits specified in Section 6.5 of the technical requirements1.
- Filters must ensure attenuation for signals outside licensed frequency blocks (selective enhancers) or SMP bands (broadband enhancers)1.
3. Homologation and Certification
- All signal enhancers must undergo Anatel’s conformity assessment and homologation process under Resolução nº 715/20191.
- Testing procedures are outlined in Tables 1 (broadband) and 2 (selective) of the technical requirements, referencing FCC KDB 935210 D03/D04 for:
4. Warning Labels and Consumer Obligations
- Equipment must display legible warning messages on:
- Mandatory warning text:
> "The installation of an indoor signal enhancer for SMP and its connection to telecommunications networks require prior approval from the authorized SMP provider using the radiofrequencies in the installation area. Unauthorized use or lack of provider approval may result in interference with telecommunications services and is subject to penalties under Brazilian law."1
- Consumers must immediately deactivate the enhancer if interference occurs1.
5. Authority and Enforcement
- Anatel’s Superintendência de Outorga e Recursos à Prestação is responsible for:
- Non-compliance may result in:
6. Key Deadlines and Transitional Provisions
- The new requirements (replacing Ato nº 2271/2022) entered into force upon publication in Anatel’s Boletim de Serviço Eletrônico1.
- No grandfathering: All enhancers must comply with the updated standards, regardless of prior certification1.
Regulation Analysis
| Regulation | Key Requirement | Threshold/Deadline | Authority |
|---|---|---|---|
| Resolução nº 772/2025 (PDFF) | Signal enhancers must align with Brazil’s frequency allocation plan1, 2. | Immediate compliance | Anatel |
| Resolução nº 773/2025 | Compliance with radiofrequency usage conditions (e.g., power limits)2. | Immediate compliance | Anatel |
| Ato de Requisitos Técnicos (Annex) | Homologation mandatory for all enhancers; testing per FCC KDB 9352101. | Post-publication enforcement | Superintendência de Outorga |
| Lei nº 9.472/1997 (Art. 19, VIII) | Anatel’s authority to administer spectrum and enforce standards2. | Ongoing | Anatel |
| Resolução nº 715/2019 | Conformity assessment procedures for telecommunications equipment1. | Ongoing | Anatel |
Summary Answer
Brazil’s new technical requirements for signal enhancers, mobile network boosters, and related equipment mandate strict compliance with frequency allocation plans (PDFF)1, 2, gain/noise limits1, and automatic interference safeguards1. All devices must undergo Anatel homologation1 and display warning labels about provider approval and interference risks1. Manufacturers must provide user manuals, support contacts, and restricted accessory guidance1. Non-compliance may result in homologation revocation or legal penalties under Lei nº 9.472/19972. The updated rules, replacing prior standards, took effect upon publication in Anatel’s official bulletin1.
Sources
- ↩ WTO TBT notification 26-03518 — Brazil https://members.wto.org/crnattachments/2026/TBT/BRA/26_03518_00_x.pdf
- ↩ apps.anatel.gov.br — ParticipaAnatel / VisualizarTextoConsulta https://apps.anatel.gov.br/ParticipaAnatel/VisualizarTextoConsulta.aspx?TelaDeOrigem=2&ConsultaId=20398